EG–168 ENGINE – EMISSION CONTROL SYSTEMS (2JZ–GE) Cap Filter P10540 Vacuum Gauge EGR Vacuum Modulator EGR Valve P11095 COLD EGR Pipe P11096 HOT Vacuum Gauge EGR Vacuum Modulator Port R Disconnect To Intake Manifold P11097 EXHAUST GAS RECIRCULATION (EGR) SYSTEM EGR SYSTEM INSPECTION 1. CHECK AND CLEAN FILTER IN EGR VACUUM MODULATOR (a) Remove the cap and filter. (b) Check the filter for contamination or damage. (c) Using compressed air, clean the filter. (d) Reinstall the filter and cap. HINT: Install the filter with the coarser surface facing the at- mospheric side outward. 2. INSTALL VACUUM GAUGE Using a 3–way connector, connect a vacuum gauge to the hose between the EGR valve and EGR vacuum modulator. 3. INSPECT SEATING OF EGR VALVE Check that the engine starts and runs at idle. 4. INSPECT VSV OPERATION WITH COLD ENGINE (a) The engine coolant temperature should be below 45°C (113°F). (b) Check that the vacuum gauge indicates zero at 2,500 rpm. (c) Check that the EGR pipe is not hot. 5. INSPECT OPERATION OF VSV AND EGR VACUUM MODULATOR WITH HOT ENGINE (a) Warm up the engine to above 50°C (122°F). (b) Check that the vacuum gauge indicates low vacuum at 3,500 rpm. (c) Disconnect the vacuum hose from port R of the EGR vacuum modulator and connect port R directly to the air intake chamber with another hose. (d) Check that the vacuum gauge indicates high vacuum at 3,500 rpm. HINT: As exhaust gas is increasingly recirculated, the engine will start to misfire. 6. REMOVE VACUUM GAUGE Remove the vacuum gauge, and reconnect the vacuum hoses to their proper locations.